The circumstances were too complex for them to cope with. (Make it complex)

A The circumstances were very complex that they could not cope with.

B The circumstances were too complex that they cannot cope with.

C The circumstances were so complex that they could not cope with.

D The circumstances were so complex that they cannot cope with

Correct Answer: Option C

Simple Sentence এ Past Tense এ too … to থাকলে, Complex Sentence এ so …. that + sub + could +V0 বসে।